The shell is rounded or subtriangular and the valves markedly convex. The surface has irregular striations and moderately dense pores. The hinge plate is narrow, and the cardinal teeth slightly bent. Pre-siphonal mantle suture short. Outer demibranch posterior. It reaches 4.2 mm in length.
Pisidium (Euglesia) tasmanicum Tenison Woods, 1876
Common name: Pea shell, pea clam, pill clam
Infraclass Heteroconchia
Cohort Heterodonta
Megaorder Neoheterodontei
Order Sphaeriida
Superfamily Sphaerioidea
Family Sphaeriidae
Genus Pisidium Pfeiffer, 1821
Subgenus Euglesa Jenyns, 1832
Original name: Pisidium tasmanicum Tenison Woods, 1876. Tenison Woods, J. F. (1876). On the freshwater shells. Papers and Proceedings of the Royal Society of Tasmania 1875: 66-82.
Type locality: ?Browns River, Tasmania
Lives in creeks and sometimes lakes. Brood pouch formed by four or five filaments and contains one to five larvae. Suspension and deposit feeder.
South-eastern Australia including Tasmania.
Korniushin, A. V. (2000). Review of the family Sphaeriidae (Mollusca: Bivalvia) of Australia, with the description of four new species. Records of the Australian Museum 52: 41-102.
Kuiper, J. G. J. (1983). The Sphaeriidae of Australia. Basteria 47: 3-52.
Lamprell, K. & Healy, J. (1998). Bivalves of Australia, volume 2. Leiden, Backhuys Publishers.
Lee, T. (2019). Sphaeriidae Deshayes, 1855 (1820). Pp. 197-201 in C. Lydeard & Cummings, K. S. Freshwater Mollusks of the World: a Distribution Atlas. Baltimore, John Hopkins University Press.
Smith, B. J. (1992). Non-marine Mollusca. Pp. i-xii, 1-408 in W. W. K. Houston. Zoological Catalogue of Australia, 8. Canberra, Australian Government Publishing Service.
Smith, B. J. & Kershaw, R. C. (1979). Field guide to the non-marine Molluscs of South-eastern Australia. Canberra, A.N.U. Press.
Smith, B. J. & Kershaw, R. C. (1981). Tasmanian Land and Freshwater Molluscs. Hobart, University of Tasmania.
Tenison Woods, J. F. (1876). On the freshwater shells. Papers and Proceedings of the Royal Society of Tasmania 1875: 66-82.
